feat: CLI v2.1.81–v2.1.104 support (#261)

## Summary

Implements support for all Claude Code CLI changes from v2.1.81 through v2.1.104, closing issues #253–#260.

### Changes

- **#253** — New `CwdChanged` hook event: parse and emit `claude:cwd-changed` Tauri event; new `CwdChangedEvent` type
- **#254** — New `FileChanged` hook event: parse and emit `claude:file-changed` Tauri event; new `FileChangedEvent` type
- **#255** — Idle-return prompt: TUI-only feature, not present in `--output-format stream-json` mode — closed as not applicable
- **#256** — New `TaskCreated` and `PermissionDenied` hook events: parse and emit `claude:task-created` / `claude:permission-denied` Tauri events; `PermissionDenied` also triggers `CharacterState::Permission` character animation
- **#257** — Defer permission request: no PreToolUse hook response mechanism in Hikari Desktop — closed as not applicable
- **#258** — `Monitor` tool: added `"Monitor"` to `SEARCH_TOOLS` constant so it maps to `CharacterState::Searching`
- **#259** — `disableSkillShellExecution` setting: wired through `ClaudeStartOptions`, `HikariConfig`, `--settings` JSON, TypeScript interface, and exposed in the Config Sidebar UI
- **#260** — Updated `SUPPORTED_CLI_VERSION` constant from `"2.1.80"` to `"2.1.104"`

All changes pass `check-all.sh` (ESLint → Prettier → svelte-check → Vitest → Clippy → cargo test with llvm-cov).

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #261
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src-tauri/src/config.rs

@@ -54,6 +54,9 @@ pub struct ClaudeStartOptions {
 
     #[serde(default)]
     pub session_name: Option<String>,
+
+    #[serde(default)]
+    pub disable_skill_shell_execution: bool,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -203,6 +206,11 @@ pub struct HikariConfig {
 
     #[serde(default)]
     pub model_overrides: Option<HashMap<String, String>>,
+
+    /// Prevents skill scripts from executing shell commands (Claude Code v2.1.91+).
+    /// Passes `"disableSkillShellExecution": true` via the `--settings` flag.
+    #[serde(default)]
+    pub disable_skill_shell_execution: bool,
 }
 
 impl Default for HikariConfig {
@@ -254,6 +262,7 @@ impl Default for HikariConfig {
             enable_claudeai_mcp_servers: true,
             auto_memory_directory: None,
             model_overrides: None,
+            disable_skill_shell_execution: false,
         }
     }
 }
@@ -405,6 +414,7 @@ mod tests {
         assert!(config.enable_claudeai_mcp_servers);
         assert!(config.auto_memory_directory.is_none());
         assert!(config.model_overrides.is_none());
+        assert!(!config.disable_skill_shell_execution);
     }
 
     #[test]
@@ -459,6 +469,7 @@ mod tests {
                 "claude-opus-4-6".to_string(),
                 "arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-opus-4-6-v1".to_string(),
             )])),
+            disable_skill_shell_execution: true,
         };
 
         let json = serde_json::to_string(&config).unwrap();